Tray base



FIG. 1 is a top perspective view of a tray base according to my newdesign;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is an end view thereof;

FIG. 4 is an opposite end view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is an opposite side view thereof.

CLAIM The ornamental design for a tray base, as shown and described.